Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability

Spawning potential ratio (SPR) is a commonly used biological reference point to inform management decisions; however, the fish reproductivity may vary substantially with different body conditions, and the variability has not been well understood. Here, we examined the maturity, fecundity, and SPR of...

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Autores principales:	Xiuxia Mu, Chongliang Zhang, Binduo Xu, Yupeng Ji, Ying Xue, Yiping Ren
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	SPR Fecundity Body condition Harvest restriction Conger myriaster Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/fbfc50ebdfea4ae8813d5c415d88fd99
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spelling	oai:doaj.org-article:fbfc50ebdfea4ae8813d5c415d88fd992021-12-01T04:59:25ZAccounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability1470-160X10.1016/j.ecolind.2021.108116https://doaj.org/article/fbfc50ebdfea4ae8813d5c415d88fd992021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21007810https://doaj.org/toc/1470-160XSpawning potential ratio (SPR) is a commonly used biological reference point to inform management decisions; however, the fish reproductivity may vary substantially with different body conditions, and the variability has not been well understood. Here, we examined the maturity, fecundity, and SPR of a marine eel Conger myriaster. The results showed that total fecundity increased with length and hepatosomatic indices (HSI), whereas relative fecundity (total fecundity/body weight) decreased with body weight, suggesting length- and condition-driven reproductive strategies. A length-structured per-recruit model was used to estimate SPR and examine the influence of HSI in resultant management decisions. Our results suggested that this stock was subject to a high risk of recruitment overfishing. Fish condition greatly influences the estimates of SPR-related reference points. For example, when HSI increased from 0.6% to 1.8%, F40% increased by 91%. In addition, using spawning stock biomass to calculate F40% could produce a bias of 23%. We highlight the need for monitoring the changes in fish fecundity and conditions in fisheries assessment, which may contribute to the robust management of data-poor fisheries.Xiuxia MuChongliang ZhangBinduo XuYupeng JiYing XueYiping RenElsevierarticleSPRFecundityBody conditionHarvest restrictionConger myriasterEcologyQH540-549.5ENEcological Indicators, Vol 130, Iss , Pp 108116- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SPR Fecundity Body condition Harvest restriction Conger myriaster Ecology QH540-549.5
spellingShingle	SPR Fecundity Body condition Harvest restriction Conger myriaster Ecology QH540-549.5 Xiuxia Mu Chongliang Zhang Binduo Xu Yupeng Ji Ying Xue Yiping Ren Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
description	Spawning potential ratio (SPR) is a commonly used biological reference point to inform management decisions; however, the fish reproductivity may vary substantially with different body conditions, and the variability has not been well understood. Here, we examined the maturity, fecundity, and SPR of a marine eel Conger myriaster. The results showed that total fecundity increased with length and hepatosomatic indices (HSI), whereas relative fecundity (total fecundity/body weight) decreased with body weight, suggesting length- and condition-driven reproductive strategies. A length-structured per-recruit model was used to estimate SPR and examine the influence of HSI in resultant management decisions. Our results suggested that this stock was subject to a high risk of recruitment overfishing. Fish condition greatly influences the estimates of SPR-related reference points. For example, when HSI increased from 0.6% to 1.8%, F40% increased by 91%. In addition, using spawning stock biomass to calculate F40% could produce a bias of 23%. We highlight the need for monitoring the changes in fish fecundity and conditions in fisheries assessment, which may contribute to the robust management of data-poor fisheries.
format	article
author	Xiuxia Mu Chongliang Zhang Binduo Xu Yupeng Ji Ying Xue Yiping Ren
author_facet	Xiuxia Mu Chongliang Zhang Binduo Xu Yupeng Ji Ying Xue Yiping Ren
author_sort	Xiuxia Mu
title	Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
title_short	Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
title_full	Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
title_fullStr	Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
title_full_unstemmed	Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
title_sort	accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/fbfc50ebdfea4ae8813d5c415d88fd99
work_keys_str_mv	AT xiuxiamu accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability AT chongliangzhang accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability AT binduoxu accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability AT yupengji accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability AT yingxue accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability AT yipingren accountingforthefishconditioninassessingthereproductivityofamarineeeltoachievefisherysustainability
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Accounting for the fish condition in assessing the reproductivity of a marine eel to achieve fishery sustainability

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